function chartDarkTheme() {
    _widgetMachineStatus.data.datasets[0].backgroundColor = '#7cb305'; //Running
    _widgetMachineStatus.data.datasets[1].backgroundColor = '#fa8c16'; //Wait
    _widgetMachineStatus.data.datasets[2].backgroundColor = '#ff7875'; //Error
    _widgetMachineStatus.data.datasets[3].backgroundColor = '#8c8c8c'; //Unknown
    _widgetMachineStatus.data.datasets[4].backgroundColor = '#8c8c8c'; //Disconnect
    _widgetMachineStatus.update();
}